Multiple permanent mold



Nov. 1, 1932.

M. S. CLAWSON MULTIPLE; PERMANENT MOLD Filed Aug. 30, 1929 2 Sheets-Sheet E gmgm E o o o 0 Nov. 1, 1932.

M. S. CLAWSON MULTIPLE PERMANENT MOLD Filed Aug. 30, 1929 2 Sheets-Sheet 2 Man/a6 6. 67601450 Patented Nov. 1, 1932 UNITED STATES.

PATENT OFFICE MONROE S. CLAWSON, OF MONTCLAIR, NEW JERSEY; ANNA IRONS CLAWSON EXECUTRIX OF SAID MONROE S. CLAWSON, DECEASED MULTIPLE PERMANENT MOLD Application filed August 30, 1929. Serial No. 389,516.

The invention relatesto metal founding and has for its general object the provision of a novel multiple mold of the chill type adapted to be power operated into either I I open or closed position.

An important ob]ect of the invention is toprovide a multiple chill mold in which the mold sectionsin the successive units may be opened or closed by fluid pressure means.

A more specificobject of the invention is to provide a multiple mold structure having a lazy tongs and supporting and operating means whereby the sections of all the units maybe opened or closed simultaneously.

Another objectof the invention is to provide an apparatus of this character embodying a novel connection or mounting of the mold units with or upon the lazy tongs, the units being moreover adapted to be con nected'in a peculiar manner for simultaneous operation and being additionally equipped with means for engagement by hoisting mechanism so that the units may be lifted about wherever their use is desired or when they are to be stored away.

Another important object of the invention is to provide a multiple'mold wherein pouring into all the units may be done at one'oporation, thereby saving time as well aslabor.

Still another object is to provide a mold unit of novel form andequipped with a removable baffle plate whichoperates to prevent delay in refilling the mold as it will be dislodged with the casting in the event of sticking and may be replaced by another promptly. I

The invention further contemplates the provision of various. improvements in devices of this general class.

An additional object is to provide a mold structure and assembly whichwill be simple and inexpensive to make, assemble or install, positive and rapid in action, efficient and durable in service, and a general improvement in the art.

To the attainment of the foregoing and other objects and advantages, the invention preferably consists in the details of construction and the arrangement and combination of parts to be hereinafter more fully described and claimed, and illustrated in the accom-. panying drawings in which:

Figure 1 is a plan view of the apparatus showing the mold units in closed position ready for pouring,

Figure 2 is a similar view with the mold units in opened position,

Figure 3 is a side elevation, 1

Figure 4 is a fragmentary plan view on a larger scale showing the mold units more clearly,

Figure 5 is a cross section through the assembly and showing a side elevation of one of the mold section, and

Figure 6 is an edge elevation of a mold unit on a larger scale, with parts broken away and in section.

Referring more particularly to the drawing's, the numeral 10 designates a supporting truck of any ordinary or preferred detailed construction and mounted upon wheels 11. This truck is provided in its top with an open portion 12 at one side of which is a guide '13. Located within the recess 12'is a group of mold units 15 supported upon a lazy tongs 16 and adapted to move along the truck and guide 13 under circumstances to be described.

This lazy tongs structure is represented as comprising a plurality of similar links 17 pivoted in crossed relation by socketed members 18. v At one side of the tongs the links are pivotally connected at 19 while at the other side they are pivotally connected by members 20 having sockets 21 therein. The mold units 15 are of the chill type and are of general rectangular shape and are of course arranged in mating or complementary pairs as clearly indicated. Secured upon the rear edges of the units of each pair are angular bracket members 22 formed with interfitting hinge knuckles 23 through which passes a pivot pin 24:. These pins are received with in the socketed members or rollers 18 at the points of crossing of the links 17. The members 18 slide along the groove 13 and assist in guiding the .tongs. The sockets inthe members 18 are indicated at 26. By this construction it will be seen that the units of each pair may swing toward or from each other. as the case may be in the operation to be explained. The lower forward and outer corner of one unit in each pair is shown as formed with a boss 27 formed or otherwise rovided with a trunnion 28, these trunnions i geceived within the sockets 21 in the mem which connect the ends of the links at one side of the lazy tongs structure. As the other mold unit of each pair has no direct'connection with the links 17 and as it is necessary that all of the units move simultaneously toward or away from each other I may provide angular brackets 29 on the forward edges of the units, these brackets being agilertured for the reception of inverted U- s ped hooks 'or staples 30 which will constitute an operative connection between the unitsmfleach pair with the adjacent ones of thenel't pair. As it is intended that any desired number of units can be used, of, course w ithim-eertain limits, and as it may at times be necemary to add or remove one or more, the units are preferably provided with angulaniapei'tured brackets 31 at the top, these adapted to be engaged by a crane or other hoisting means.

of the cavity in the mold units is chem immaterial and is therefore not shown. However, the confronting faces of each pair of unitsmust be flat and true so as tmfitclosely and prevent escape of molten metal during ouring. A very important feature. the invention is the fact that all of the molds may be filled at the same time. Ilr'carryingout this feature I form all of the mold units with atrough or gutter 32 which willexbendthroughout the entire series, the gutteu-ofeourse communicating with mating spmefopenings, 33 in the confronting faces (vs-she. units so that molten metal poured into the trough and running therealong will flow-into all of the molds. The gutter forming recesses in the mold sections slope toward the sprue openings, so that the gutter is not'of uniform depth but is rather in the form of a connected series of pockets. The of this is that as the metal flows into the mold cavities the surplus will collect in the individual pockets, so that it will not solidifyas a continuous body and prevent opening of the molds.

. Another important feature of the invention is the provision of a removable baflle for each pair of units, this baflle being detachably connected therewith so as to be capable ot'pulling out in case it sticks to the cast metal whenthe same solidifies and when the mold is opened. This baflle is represented as comprising a rectangular plate 34 slidably rece ved within alined grooves 35 in the mold units. when the units are all in assembled relation as shown in Figures 1 and 3 the ends oi these bafle plates will be in abutting relation and will form. in efl'ect, a continuous wall at one side of the trough or gutter 32 which will operate to prevent splashing or overflowing of the molten metal during pourhave their ends pivotally connected at 43 with ears 44 on the outermost mold units. Clearly, there must be a slot and pin provided, or its equivalent, to permit the necessary play. The cylinder is equipped centra ly with a fluid pressure conducting pipe 45 and at its ends with similar pipes'46.

In the use of the device, it is of course assumed that the laz tongs. structureis constructed and assem led as shown. Any desired number of mold units may then be placed in position upon the lazy tongs with the pintle pins 24 engaging within the sockets 26, and with the trunnions 28 on the alternate units engaged within the sockets 21 in the members 20. The U-shaped members 30 are then laced in position and the arms/l2 connect with the cars 44. Assuming that the molds are all in open position as shown in Figure 2, it is apparent that the istons 37 are at their outermost positions'wlth the lazy tongs extended. When it is desired to 'cast, fluid pressure is admittedby suitable valve means, not shown,-through the pipes 46 and will operate to force the pistons 37 toward each other, the air between them'exhausting through the pipe 45. As the pistons are thus moved, the arms 42 will move toward each other and will close up the tongs with the result that all of the mold units 18 will be forced into contactin relation. To facilitate coolin after casting, the, outer faces of the mo (1 units are represented as corrugated or ridged except at the areas where they must contact closely to form a continuous gutter or trough. After the mold units have been forced together, the baflle plates 34 are slipped into the grooves 35, subsequently to which the molten metal is poured into the trough or gutter'so as to enter and fill the cavities in the molds. After the metal has set and it is desired to remove the castings, the operation is reversed, that is to say fluid pressure is admitted through the pipe 45 to forcethe pistons 37 and arms 42 outwardly so as to open up or extend the lazy tongs and swing all of the mold units into the open position shown in Figure 2. The castings may then of course drop down through the open part of the truck. Before the castings can be removed it is of course apparent that the baflle plates must be removed from the slots or grooves in which they are received.

It will be noted that the present device distinguishes clearly from the turret type of mold or mold holder in that the molds are carriedby a truck movable along a trackway step by step beneath the pouring spout 47 instead of having the spout movable along over and above a series of molds. Further more the truck or track system is of benefit in that after casting and hardening of the metal the truck may be moved over a pit into which the castings are discharged when the molds are opened by extending the lazy tongs in the manner above described. If desired the truck may be moved over a hot or cold duct, not shown, where the molds may be heated or cooled as desired depending upon circumstances, the character of the work, the nature of the castings and other considerations.

From the foregoing description and a study of the drawings it will be apparent that I have thus provided a very simply constructed and easily operated multiple mold of one type by means of which a large number of castings may be produced in the minimum time and with the least possible effort so that production may be greatly increased and labor expenses reduced.

lVhile I have shown and described the preferred embodiment of the invention, it should be understood that the disclosure is merely an exemplification of the principles involved as the right is reserved to make all such changes in the details of construction as will widen the field of utility and increase the adaptability of the device provided such changes constitute no departure from the spirit of the invention or the scope of the claims hereunto appended.

Having thus described the invention, I claim: a

1. In a multiple mold apparatus, a support, a lazy tongs structure mounted thereon, means for extending or contracting the lazy tongs, and a plurality of coacting mold units mounted on said lazy tongs and movable therewith into contacting or spaced re lation.

' 2. In a multiple mold apparatus, a support, a lazy tongs mounted thereon and including a series of links arranged in pivoted crossed relation and pivotally connected, mold members carried by the lazy tongs and movable with the links thereof into contacting or spaced relation, and power operated means for extending or contracting the lazy tongs.

3. In a multiple mold apparatus, a support, a lazy tongs mounted thereon and ineluding a series of links arranged in pivoted crossed relation and pivotally connected, mold members carried by the lazy tongs and movable with the links thereof into contacting or spaced relation, and power operated means for extending or contracting the lazy tongs, said means comprising a fluid pressure operated mechanism connected with the endmost mold members.

4. In a multiple mold apparatus, a support, a lazy tongs mounted thereon and in cluding a series of links arranged in pivoted crossed relation and pivotally connected,

mold members carried by the lazy tongs and for extending or contracting the lazy tongs,

said means comprising a cylinder arranged beside the lazy tongs and provided with fluid pressure conducting pipes, pistons operating within the cylinder and mounted on piston rods, and arms carried by the piston rods and pivotally connected with the endmost mold a members.

6. A device of the character described comprising a supporting truck having a guide in its top and provided with guide rails parallel with the guide, a lazy tongs structure mounted for movement along the guide and including pivotally connected links pivoted in crossed relation, mold members carried by the links and movable therewith, a cylinder parallel with the guide and having fluid pressure conducting pipes cornmunicating therewith, pistons within the cylinder mounted on piston rods, heads on said rods slidable along said guide rails and arms carried by said heads and movably connected with the endmost mold members.

7. In a device of the character described, a support having an open portion and a guide at one side thereof, a lazy tongs mounted for movement along the guide and including a series of links pivotally connected in crossed relation, pairs of mold members mounted on the lazy tongs, the members of each pair being connected at one end by a pivot element pivotally engaged with the links at their point of crossing, means for connecting the other edges of the mold members of adjacent pairs, means on the alternate mold members pivotally engaging the pivot points of the links at one side of the lazy tongs, and means for extending or contracting the lazy tongs.

8. In an apparatus of the character dep8. mold comprising a pair of similar nzembem means at one edge of said memior "'pivotally connecting the same,

means at the opposite edges of said members for connecting them together or to an ada imoldpseparable members having cavities therein mating to define a casting reease, the mold members further having opencommunicating with said cavities and inga pourin entrance, said members being grooved, and a removable baflle 'plate v within said groove and extending adthe jsncture of the casting recess and entrance. i a apparatus of the class described eomprising a supporting structure, a: pair of crossed levers pivoted intermediate their ends carried on the structure, a mold section on Owl! lever of the pair, said mold sect-ions beingcom Iem'entary, and means for swinging one ofi e levers relatively to the other.

Ilt Azmultiple mold apparatus comprising supporting structure, a plurality of molds on t structure comprised of two complementarysections, at least one section of each mold being supported for movement toward and away from the other, and means ior simultcneously opening and closing ali of the molds. t

11%. A multiple mold apparatus comprising e'mtpporting structure, a plurality of molds on e'structure 1 com ised of two c0mplemmtary sections, said sections being arranged for movement reiatively to each other fer 0 V ing and closing the molds, and means fprmmultaneousiy operating all of the molds, said mold sections all having gutter portions therein which are in registering alinement when the molds are closed and forming a substa'ntially continuous trough along the series of molds. 18. A multiple mold apparatus comprising supporting structure, a plurality of molds onthestructure comprised of two complementary sections, said sections being arranged formovement relatively to each other for ing and closing the molds, means for sim'u taneously operating all of the molds, said'mold sections all having gutter portions therein which are in registering alinement when the moids are closed and forming a substantially continuous trough along the series of molds, and removable baflie plates retained in-the mold sections along one side of the gutter. 4 "14. A multiple mold apparatus comprising a supporting structure, a plurality of molds ou the structure comprised of two complementary sections, said sections being arranged for movement relativelyto each other for opening and closin the molds, means for simultaneously operating all of the molds, said mold sections all having gutter ortions therein. which are in registering a mement when the molds are closed and forming a substantially continuous trough along the series of molds, and removabie bafile plates retained in the mold sections along one side of the gutter, the baflle plates being of a length equal to the width of a mold and spanning the crevice between the two sections of the mold when the mold is closed.

15. In a multiple mold apparatus, a plurality of two-part molds, means for opening and closing said two-part molds, each part of a mold having a gutter portion thereon adapted to come into alinement with and register with the gutter portions of the adjacent mold parts, the mold parts adjacent the gutter portions being adapted to come into abutting relation, to form a continuous groove along the series of molds when the molds are closed.

16. In a multiple mold apparatus, a plurality of two-part molds, means for opening and closing said two-part molds, each part of a mold having a gutter portion thereon adapted to come into alinement with and register with the gutter portions of the adjacent mold parts, and mold parts adjacent the gutter'portions being adapted to come into abutting relation to form a continuous groove along the series of molds when the molds are closed, the major portion of the outer faces of the mold parts being out of abutting relation with each other to provide air circulating spaces between the respective molds when they are closed.

17. An apparatus of the class described comprising a plurality of pairs of levers, a pair of complementary mold sections connected witheach pair oflevers, and means for simultaneously operating the levers to open and close the molds.

18. In an apparatus of the class described, a pair of levers, a pair of complementary mold parts, one part being carried on each lever, means for moving at least one of the levers with respect to the other, the mold parts being set at an angle to the levers whereby the opposed faces thereof may be brought into abutting relation when one lever is'moved toward the other.

19. In a multiple mold apparatus, a supporting structure, a plurality of molds slidably mounted on the supporting structure, each mold being comprised of two sections, the sections being arranged for relative movement along the supporting structure to- Ward and away from each other, and a system of toggle levers of the lazy tong type connected with the mold sections for effecting such operation of the mold sections relains tively to each other and along the supporting structure.

20. In a multiple mold apparatus, a supporting structure, a plurality of divided molds mounted on the supporting structure for sliding and swinging movement relatively thereto having mold sections which are pivotally connected at their opposite edges, a system of toggle levers of the lazy m tong type operatively connected with the mold sections for opening and closing the molds simultaneously, and means connected to each end of the toggle lever system for applying motion thereto.

5 21. In a multiple mold apparatus, a plurality of two-part molds, means for opening and closing said two-part molds, each part of a mold having a metal receiving gutter portion thereon, which gutter portions slope downwardly from the outer faces of the mold parts toward the meeting line thereof, there being complementary parts of a sprue opening at the bottom of said gutter portion in the meeting surfaces of the two mold parts, the gutter portions of the several molds being adapted to come in alinement with the gutter portions of the adjacent molds when the molds are all closed, the mold parts adjacent the gutter being adapted 80 to come into abutting relation and thereby form a substantially continuous gutter comprised of a plurality of pockets, one pocket eing formed in each two-part mold, the major portion of the outer faces of the mold parts being out of abutting relation with each other at all times to provide air-circulating spaces between the respective molds when they are closed.

22. In a multiple mold apparatus, a plurality of two-part molds, means for opening and closing said two-part molds, each twopart mold having a hot metal receiving pocket therein, portions of the pocket being formed in each of the two parts of the mold,

the pockets for all of the molds being in alinement and forming a substantially continuous gutter having a serrated bottom, the pocket of each mold having a sprue opening at the bottom thereof.

23. In a multiple mold apparatus, a plurality of two-part molds, means for opening and closing said two-part molds, each twopart mold having a hot metal receiving pocket therein, portions of the pocket being formed in each of the two parts of the mold, the pockets for all of the molds being in alinement and forming a substantially continuous gutter having a serrated bottom, the pocket of each mold having a sprue opening at the bottom thereof, and a plurality of removable bafile plates received in the mold parts and positioned along one side of said gutter.

In testimony whereof I afiix my signature.

l5 MONROE S. GLAWSON. 

